Update a bunch of files to the new location of browser_thread.h

chrome/browser/power_save_blocker_mac.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/power_save_blocker.h"
 
 #include <IOKit/pwr_mgt/IOPMLib.h>
 
-#include "chrome/browser/browser_thread.h"
+#include "content/browser/browser_thread.h"
 
 // Run on the UI thread only.
 void PowerSaveBlocker::ApplyBlock(bool blocking) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   // Block just idle sleep; allow display sleep.
   // See QA1340 <http://developer.apple.com/library/mac/#qa/qa2004/qa1340.html>
   // for more details.
 
   static IOPMAssertionID sleep_assertion = kIOPMNullAssertionID;
   IOReturn result;
   if (blocking) {
     DCHECK_EQ(sleep_assertion, kIOPMNullAssertionID);
     result = IOPMAssertionCreate(
         kIOPMAssertionTypeNoIdleSleep,
         kIOPMAssertionLevelOn,
         &sleep_assertion);
   } else {
     DCHECK_NE(sleep_assertion, kIOPMNullAssertionID);
     result = IOPMAssertionRelease(sleep_assertion);
     sleep_assertion = kIOPMNullAssertionID;
   }
 
   if (result != kIOReturnSuccess) {
     NOTREACHED();
   }
 }